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All Journal Techno.Com: Jurnal Teknologi Informasi Jurnal Pekommas ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Teknologi dan Sistem Komputer Jurnal Listrik, Instrumentasi, dan Elektronika Terapan
HENDRY, JANS
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media

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Aplikasi Electronic Nose Untuk Klasifikasi Kopi Aceh Gayo Berdasarkan Proses Pasca Panen Sumanto, Budi; Nathasya, Iota; Wijaya, Wahyu; Hendry, Jans
Jurnal Teknologi dan Sistem Komputer [IN PRESS] Volume 11, Issue 1, Year 2023 (January 2023)
Publisher : Department of Computer Engineering, Engineering Faculty, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jtsiskom.2023.14421

Abstract

Kopi merupakan salah satu komoditas asal Indonesia dengan daya tarik aroma dan rasa yang khas. Salah satu jenis kopi yang terkenal adalah Kopi Aceh Gayo. Kopi ini memiliki beberapa jenis lagi yang dibedakan melalui proses pasca panen yang dikenakan pada biji kopi yang sama. Hasil pengolahan ini akan menghasilkan aroma dan kualitas yang berbeda seperti pada Gayo natural dan wine. Kualitas kopi umumnya diuji menggunakan hidung manusia yang cenderung memiliki kekurangan karena sifatnya yang subyektif. Adanya kekurangan inilah yang berusaha dibantu dengan menggunakan e-nose dan SVM. E-nose merupakan instrument pengukuran yang memanfaatkan sensor gas untuk mengumpulkan data sinyal dari obyek yang digunakan. SVM (Support Vector Machine) merupakan metode yang digunakan untuk mencari hyperplane terbaik yang dapat memisahkan kedua jenis kopi yang digunakan sebagai obyek percobaan ini. Penggunaaan E-nose dan SVM menghasilkan akurasi prediksi sebesar 90%, presisi sebesar 87,5% dan sensitivitas 93,3%.
Purwarupa Light Meter Menggunakan Sensor Warna untuk Fotografi Kumara, Alam Ega; Hendry, Jans
Jurnal Pekommas Vol 9 No 1 (2024): Juni 2024
Publisher : Sekolah Tinggi Multi Media “MMTC” Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56873/jpkm.v9i1.5569

Abstract

Light plays an important role in the photography that it affects the quality of the photos. The lighting in the photo is influenced by the three elements of Triangle Exposure, namely aperture, shutter speed, and ISO contained in the camera settings. A tool named Light Meter is a tool that can measure photographic lighting by calculating the intensity of light received by the object of the photo to then adjust the Triangle Exposure elements to get recommendations for appropriate camera settings. In this study, the light meter was implemented using an ESP32 microcontroller combined with a TCS34725 color sensor that functions to detect light intensity. The results of the TCS34725 color sensor to detect light intensity compared to the comparison lux meter AS803 obtained an eror value of 0.3 indoors and 17.2 outdoors with the addition of a dome diffuser. Based on the detected light intensity data is then used in the calculation of Triangle Exposure adjustment. The results of the implementation of the Triangle Exposure recommendation provided by the tool for camera settings show photos with a more even distribution of light and color based on histogram analysis in low light conditions.
Purwarupa Sistem Conveyor Scale Berbasis Loadcell, PLC, dan Protokol MQTT dan Analisisnya Kusuma, Dani Yudha; Hendry, Jans
Techno.Com Vol. 23 No. 3 (2024): Agustus 2024
Publisher : LPPM Universitas Dian Nuswantoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62411/tc.v23i3.11227

Abstract

Sistem conveyor scale berdasarkan bobot produk dan menerapkan IoT telah dikembangkan. Sistem ini menggunakan sensor loadcell Hx711, photoelectric, motor listrik, PLC, HMI, dan sistem pneumatik. Terdapat 22 produk dengan bobot berbeda yang telah diuji. Nilai batas bawah dan atas bobot ditetapkan sebesar 0.8 kg dan 1.2 kg pada menu preset. Hasil menunjukkan ada 20 produk yang sesuai dengan pengaturan bobot dengan total bobot 21.46 kg. Lalu, ada dua produk yang tidak lolos dengan total bobot sebesar 1.45 kg dengan rata – rata sebesar 0.72 kg. Selama proses produksi, data yang dikumpulkan melalui sistem ini ditampilkan melalui laman website dengan menggunakan protokol MQTT. Sistem ini diterapkan pada CV Javamas Agropos.   Kata kunci: PLC, HMI, MQTT, Hx711, conveyor scale
Implementasi Moving Average Filter untuk Koreksi Kesalahan Sensor Pengukur Kedalaman Air RIFANTI, UTTI MARINA; PUJIHARSONO, HERRYAWAN; SETIAWAN, ANDRI; HENDRY, JANS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 2: Published May 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i2.432

Abstract

ABSTRAKAspek utama yang membedakan sensor satu dengan yang lainnya adalah tingkat akurasinya. Pada penelitian ini, dibuat sistem untuk menurunkan tingkat deviasi untuk meminimalisir kesalahan hasil pengukuran pada sensor berbiaya murah. Sensor yang digunakan adalah sensor tekanan udara BMP180. Sensor tersebut digunakan untuk mengukur kedalaman berdasarkan tekanan udara dalam air. Moving Average Filter (MAF) digunakan untuk membuang pencilan data, sehingga didapatkan data yang lebih relevan yang kemudian digunakan untuk melakukan curve fitting. Kemudian dilakukan analisis regresi linear untuk menghasilkan persamaan yang berfungsi sebagai pengoreksi data terekam dari sensor tersebut. Pengujian sistem dilakukan melalui beberapa skenario lalu diambil persamaan yang menghasilkan nilai Mean Square Error (MSE) yang paling kecil. Berdasarkan hasil penelitian, diperoleh kesimpulan bahwa MAF mampu meningkatkan akurasi data hingga mencapai 99.12%.Kata kunci: sensor BMP180, koreksi kesalahan, regresi linear, moving average filter, mean square error ABSTRACTThe main aspect that distinguishes sensors from one another is the level of accuracy. In this study, a system was developed to reduce the level of deviation to minimize the measurement error on low-cost sensors. The sensor used is the air pressure sensor, BMP180. Then this sensor is used to measure water depth based on air pressure in water. The Moving Average Filter (MAF) method is used to get rid of outliers of data, to obtain more relevant data for curve fitting. Then a linear regression analysis is performed to produce a function as a correction of recorded data from the sensor. System testing is carried out through a number of scenarios and then the equation is chosen with the smallest Mean Square Error (MSE). Based on this research, MAF increases data accuracy up to 99.12%.Keywords: sensor BMP180, error correction, linear regression, moving average filter, mean square error
Analisis Perbandingan Kinerja Ekualisasi Zero Forcing dan MMSE pada FBMC-OQAM HENDRY, JANS; ISNAWATI, ANGGUN FITRIAN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 3: Published September 2019
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i3.600

Abstract

ABSTRAKKebutuhan layanan data pada teknologi 5G sangatlah tinggi. FBMC sebagai solusi dari kelemahan yang ada di OFDM menjadi teknologi yang digunakan pada komunikasi 5G. Pada OFDM, penggunaan ekualisasi sudah sangat banyak dilakukan penelitiannya dan menunjukkan hasil yang bervariasi tergantung dari jenis ekualisasi yang digunakan. Beberapa jenis ekualisasi yang digunakan pada modulasi OFDM antara lain Zero Forcing dan MMSE. Pada penelitian ini, beberapa variasi ekualisasi tersebut diterapkan pada FBMC dan dianalisis perbandingan kinerjanya. Penggunaan modulasi Offset-QAM yang dipadukan dengan FBMC mempunyai fungsi sebagaimana cyclic prefix pada OFDM (CP-OFDM) yakni untuk mengurangi inter symbol interference (ISI). Hasilnya menunjukkan bahwa nilai BER pada FBMC yang menggunakan ekualisasi MMSE pada SNR 5 dB mempunyai nilai sebesar 0,2941 sedangkan BER pada FBMC yang menggunakan ekualisasi ZF sebesar 0,2875. Nilai SER untuk ZF sebesar 0,5514 dan untuk MMSE sebesar 0,5391. Kapasitas kanal Hal ini menunjukkan bahwa kinerja FBMC dengan menggunakan ekualisasi MMSE lebih baik dibanding Zero Forcing.Kata kunci: FBMC, Offset-QAM, ekualisasi, Zero Forcing, MMSE ABSTRACTThe needs of data service on 5G technology is extremely necessary. FBMC as a solution over OFDM's drawbacks becomes the technology that is used in 5G communication. In OFDM technology, various equalisation methods have been used and final result highly depends on which method being used. Some of equalisation methods used in OFDM modulation are Zero Forcing (ZF) and MMSE. In this research, those equalisation methods were used on FBMC modulation and the performances were analyzed. The use of Offset-QAM modulation combined with FBMC actually functioning like Cyclic Prefix on OFDM which is to reduce Inter Symbol Interference (ISI). The result shows that BER value on FBMC that used MMSE equalisation when SNR 5 dB equals to 0.2941 whereas BER value on FBMC that used ZF equals to 0.2875. The value of SER on ZF is 0.5514 and MMSE is 0.5391. Channel Capacity calculation also shows that FBMC performance with MMSE is better than Zero Forcing.Keywords: FBMC, Offset-QAM, equalization, Zero Forcing, MMSE
Seleksi Fitur Aroma Teh Kombucha menggunakan ANN untuk Optimasi Kinerja Sistem E-nose NUGROHO, ADHITYA ALVIAN; WIJAYA, WAHYU; HENDRY, JANS; SUMANTO, BUDI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 10, No 2: Published April 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v10i2.334

Abstract

ABSTRAKTeh kombucha merupakan hasil fermentasi antara teh manis dengan mikroba yang memiliki khasiat baik bagi kesehatan tubuh. Waktu yang dibutuhkan untuk fermentasi teh ini adalah 7 hingga maksimal 12 hari. Penentuan siap konsumsi dari hasil fermentasi biasanya mengacu dari umur fermentasi dan uji coba rasa oleh human tester. Selain menggunakan 2 cara tersebut, pemanfaatan sistem Electronic Nose (e-nose) dapat digunakan juga untuk melakukan identifikasi terhadap aroma teh kombucha selama proses fermentasi untuk mengetahui matang atau tidaknya. Akan tetapi timbul masalah yaitu hasil pembacaan e-nose menghasilkan data yang cukup banyak sehingga kurang efektif dan dapat menurunkan kinerja sistem, solusinya dapat diterapkan seleksi fitur menggunakan Artificial Neural Network berdasarkan dari Sum of Absolute Errors. Hasil dari penelitian ini mendapatkan 6 fitur terbaik dengan peningkatan nilai akurasi sebesar 97,22%, presisi sebesar 94,74%, dan sensitivitas sebesar 100,00%.Kata kunci: Teh Kombucha, Seleksi Fitur, E-nose, Artificial Neural Network, Sum of Absolutes Errors ABSTRACTKombucha tea is a fermented product of sweet tea with microbes that have good health benefits. The time required to ferment this tea is 7 to a maximum of 12 days. Determination of ready-to-consumption of fermented products usually refers to the age of fermentation and taste testing by a human tester. In addition to using these 2 methods, the use of the Electronic Nose (e-nose) system can also be used to identify the aroma of kombucha tea during the fermentation process to determine whether it is ripe or not. Problems that arise from reading e-nose produce quite a lot of data so that it is less effective and can reduce system performance, the solution can be applied to feature selection using an Artificial Neural Network based on the Sum of Absolute Errors. The results of this study get the best 6 features with an increase in accuracy of 97.22%, precision of 94.74%, and sensitivity of 100.00%.Keywords: Kombucha Tea, E-nose, Feature Selection, Artificial Neural Network, Sum of Absolute Errors
Design of Direct Digital Synthesizer (DDS) Based on Field Programmable Gate Array (FPGA) for Electrical Impedance Tomography (EIT) Rifai, Isnan Nur; Astuti, Wijayanti Dwi; Hendry, Jans; Santoso, Ardhi Wicaksono; Aji, Alief Purnomo
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 6, No 1 (2025)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v6i1.102579

Abstract

Direct Digital Synthesizer (DDS) systems play a critical role in high-precision signal generation for applications like medical imaging and RF communications. This research explores the development of a DDS system using Field-Programmable Gate Array (FPGA) technology, with a focus on optimizing signal accuracy, resource efficiency, and signal-to-noise ratio (SNR). The study implemented two DDS designs on an FPGA: one based on the CORDIC algorithm and the other using a Look-Up Table (LUT) approach. Key components of the system included a phase accumulator, phase register, and frequency calculation algorithms. The system's performance was evaluated by measuring signal output accuracy and SNR, utilizing the ISL6961IAZ DAC and RF Transformers PWB2010LC for signal conversion and transmission. The results showed that the DDS achieved near-target frequencies, with outputs of 100.4 kHz for a target of 100 kHz and 498.8 kHz for a target of 500 kHz. The LUT-based design demonstrated superior signal fidelity, achieving an SNR of 106 dB compared to 92 dB for the CORDIC-based design. However, resource utilization analysis revealed a trade-off between logic efficiency and memory usage: the CORDIC design consumed 26% of logic elements and only 1% of memory, while the LUT-based design used 8% of logic elements and 77% of memory. These findings highlight the importance of balancing design choices based on application-specific requirements for precision, resource constraints, and performance.
Development of an ATTiny1614-Based Heater Controller and a Silicone-Based Heating Element for a Tissue Processor Hendry, Jans; Isnianto, Hidayat Nur; Hudati, Imroatul; Irsyadi, Fakih; Najib, Muhammad; Fauzi, Ilham
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 6, No 2 (2025)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v6i2.102903

Abstract

The tissue processor is an essential device for preparing tissue samples for observation. Despite the high demand, no similar products havebeen developed locally. Therefore, the researchers have undertaken the development of a comparable device through reverse engineering. One of the key components of a tissue processor is the automatic heater, which consists of a heater controller and a heating element. Utilizing an ATTiny1614 microcontroller and a silicone pad, both components were developed to operate with the same functionality as the original. Based on the tests, the heater controller successfully supplied alternating current to the heating element according to the specified maximum temperature. The heating element test showed an impedance specification of 418.9 Ω and required only approximately 1 minute and 37 seconds to reach a temperature of 100 °C. Therefore, the resulting prototype meets the criteria for an automatic heater for a tissue processor.
Co-Authors Aji, Alief Purnomo Andri Setiawan Anggun Fitrian Isnawati Astuti, Wijayanti Dwi Budi Sumanto Hidayat Nur Isnianto Hudati, Imroatul ILHAM FAUZI IRSYADI, FAKIH Kumara, Alam Ega Kusuma, Dani Yudha Muhammad Najib NATHASYA, IOTA NUGROHO, ADHITYA ALVIAN Rifai, Isnan Nur Santoso, Ardhi Wicaksono Utti Marina Rifanti Wijaya, Wahyu